Part I QFT and the Casimir Effect.- 1. I. Ya. AREF'EVA. Colliding Hadrons as Cosmic Membranes and Possible Signatures of Lost Momentum.- 2. M. ASOREY, I. Cavero‐Pelez and J. M. Muoz‐Casta. Vacuum energy and the Topology of the Universe.-3. M. BORDAG and I. Pirozhenko. The Low Temperature Corrections to the Casimir Force Between a Sphere and a Plane.- 4. I. BREVIK. Casimir Effect for the Piecewise Uniform String.- 5. I.L. BUCHBINDER, N.G. Pletnev and I.B. Samsonov. N = 2 and N = 4 Supersymmetric Low‐Energy Effective Actions in Three Dimensions.- 6. M. CHAICHIAN. Colour Confinement, the Goto‐Imamura‐Schwinger Term and Renormalization Group.- 7. J. GOMIS. Non‐Central Extensions of (Super) Poincar Algebra and (Susy) Electromagnetic Backgrounds.- 8. K. A. MILTON, J. Wagner, P. Parashar, I. Cavero‐Pelez, I. Brevik and S. A. Ellingsen. Multiple Scattering: Dispersion, Temperature Dependence, and Annular Pistons.- Part II Gravity and Cosmology.- 9. M. BOUHMADI‐LPEZ. Brane Cosmology with an f(R)‐Contribution.- 10. S. CAPOZZIELLO. f(R)‐Gravity Matched with Large Scale Structure and Cosmological Observations.- 11. S. CARLONI. An Analysis of the Phase Space of Hořava‐Lifshitz Cosmologies.- 12. C. CORDA. Gravitational Waves Astronomy: a Cornerstone for Gravitational Theories.- 13. R. DI CRISCIENZO, L. Vanzo and S. Zerbini. Hamilton‐Jacobi Method and Gravitation.- 14. K. N. Ananda, S. Carloni and P. K. S. DUNSBY. A Characteristic Signature of Fourth Order Gravity.- 15. V. FARAONI. Horizons and Singularity in Clifton's Spherical Solution of f(R)‐vacuum.- 16. R. GARATTINI. Gravitational Zero Point Energy and the Induced Cosmological Constant.- 17. P. GONZALEZ‐DAZ. Lensing Effects in Ringholes and the Multiverse Black Holes.- 18. L. LUSANNA. Hamiltonian ADM Gravity in Non‐Harmonic Gauges with Well Defined Non‐Euclidean 3‐Spaces: How Much Darkness can be Explained as a Relativistic Inertial Effect?- 19. J. Beltrn and A. LPEZ MAROTO. Dark Energy and Cosmic Magnetic Fields: Electromagnetic Relics from Inflation.- 20. N. Carlevaro, G. MONTANI and M. Lattanzi. On the Viability of Non‐Analytical f(R)‐Theory.- 21. S. NOJIRI. Towards the Unification of Late‐Time Acceleration and Inflation by k‐Essence Model.- 22. N. Deruelle and M. SASAKI. Conformal Equivalence in Classical Gravity: the Example of "Veiled" General Relativity.- 23. L. SEBASTIANI. Finite‐Time Singularities in Modified f(R;G)‐Gravity and Singularity Avoidance.- 24. P. J. SILVA. Asymptotic Darkness in Hořava‐Lifshitz Gravity.- 25. C. F. SOPUERTA and N. Yunes. Testing Modified Gravity with Gravitational Wave Astronomy.- 26. P. K. TOWNSEND. Gravitons in Flatland.- 27. M. M. Sheikh‐Jabbari and A. TUREANU. Very Special Relativity and Noncommutative Space‐Time.- Part III Zeta Functions in Physics and Mathematics.-28. G. Fucci, K. KIRSTEN and P. Morales. Pistons Modelled by Potentials.- 29. V. Moretti. Local ζ‐functions, stress‐energy tensor, field fluctuations, and all that, in curved static spacetime.- 30. V. Muoz and R. PREZ‐MARCO. Ergodic Solenoidal Geometry.- 31. A. VOROS. Zeta‐Regularization and Exact WKB Method for a General 1D Schrdinger equation.- 32. G. Cognola and S. ZERBINI. Generalized Zeta Function Regularization and the Multiplicative Anomaly.- Part IV Non